AMG are three innocent letters that when added to the tail end of a Mercedes mean evil performance. AMG has kept Mercedes competitive in performance cars no matter the competition by making sure the tri-star brand always had plenty of power. But that could change. AMG is actively pursing a lower emissions policy for its future cars, the company has confirmed. “The horsepower war is over,” said AMG boss Volker Mornhinweg. But don't think Merc's in-house tuner has gone soft. AMG is now.